North America Non-native Plant

False Sicklepod

Botanical name: Senna multijuga

USDA symbol: SEMU5

Life cycle: perennial

Habit: tree

Native status: Non-native, reproduces and persists in the wild in Hawaii âš˜ Non-native, reproduces and persists in the wild in Puerto Rico  

Synonyms: Cassia multijuga Rich. (CAMU80)   

False Sicklepod: A Tropical Beauty That’s Not From Around Here If you’re wandering through Hawaii or Puerto Rico and spot a stunning tree covered in bright yellow flower clusters, you might be looking at false sicklepod (Senna multijuga). This eye-catching tropical tree has made itself quite at home in these ...

False Sicklepod: A Tropical Beauty That’s Not From Around Here

If you’re wandering through Hawaii or Puerto Rico and spot a stunning tree covered in bright yellow flower clusters, you might be looking at false sicklepod (Senna multijuga). This eye-catching tropical tree has made itself quite at home in these warm climates, though it originally hails from much farther south.

What Exactly Is False Sicklepod?

False sicklepod is a perennial tree that typically grows over 13-16 feet tall, though it can reach much greater heights under ideal conditions. You might also see it listed under its old scientific name, Cassia multijuga, in older gardening references. This woody beauty develops a single trunk and creates an impressive canopy that provides excellent shade.

The tree gets its common name from its distinctive seed pods, though don’t let the false part fool you – there’s nothing fake about its stunning appearance when it bursts into bloom.

Where You’ll Find It Growing

Currently, false sicklepod has established populations in Hawaii and Puerto Rico, where it reproduces on its own and has become a naturalized part of the landscape. However, it’s important to know that this tree isn’t native to these areas – it’s actually from South America, including Brazil, Peru, and Ecuador.

Why Gardeners Are Drawn to False Sicklepod

There’s no denying the appeal of this tropical stunner. Here’s what makes gardeners take notice:

  • Brilliant yellow flower clusters that create a spectacular display
  • Compound leaves with multiple leaflets that provide attractive foliage
  • Fast growth rate that quickly establishes shade and privacy
  • Ability to attract bees and other beneficial pollinators
  • Drought tolerance once established

Growing Conditions and Care

If you’re considering adding false sicklepod to your landscape, you’ll need the right climate. This tree thrives in USDA hardiness zones 9b through 11, making it perfect for truly tropical and subtropical areas.

For successful growth, provide:

  • Full sun exposure for best flowering
  • Well-draining soil (it’s not picky about soil type)
  • Regular watering while the tree is establishing
  • Space for it to reach its full size – this isn’t a small tree!

Planting and Care Tips

Getting your false sicklepod off to a good start is relatively straightforward. Plant it in a location where it has room to spread and won’t interfere with power lines or structures. Young trees benefit from consistent watering, but mature specimens are surprisingly drought-tolerant.

Pruning can help shape the tree and remove any damaged branches, but it’s generally low-maintenance once established. The tree’s natural growth habit tends to create an attractive canopy without much intervention.

A Word About Native Alternatives

While false sicklepod isn’t considered invasive, it’s worth remembering that it’s not native to Hawaii or Puerto Rico. If you’re passionate about supporting local ecosystems, consider exploring native flowering trees that provide similar benefits. Native species often support local wildlife better and are perfectly adapted to regional growing conditions.

For Hawaii, native options might include native Erythrina species or native Hibiscus. In Puerto Rico, consider native flowering trees like Tabebuia or native Erythrina varieties.

The Bottom Line

False sicklepod is undeniably beautiful and can make a striking addition to large tropical gardens and landscapes. Its showy flowers, quick growth, and low-maintenance nature make it appealing to many gardeners. However, its non-native status means you might want to balance its use with native species that better support local wildlife and ecosystems.

If you do choose to plant false sicklepod, you’ll be rewarded with a spectacular flowering display and a tree that’s likely to become a conversation starter in your landscape. Just make sure you have the space and climate to let this tropical beauty reach its full potential.

False Sicklepod

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Senna Mill. - senna

Species

Senna multijuga (Rich.) Irwin & Barneby - false sicklepod

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA